Richter Magnitude From Amplitude Calculator
Original Richter (1935) local magnitude ML = log10(A / A0), comparing maximum Wood-Anderson trace amplitude in millimeters with the zero-magnitude reference amplitude at the same epicentral distance (0.001 mm at 100 km by definition).
Description
Original Richter (1935) local magnitude ML = log10(A / A0), comparing maximum Wood-Anderson trace amplitude in millimeters with the zero-magnitude reference amplitude at the same epicentral distance (0.001 mm at 100 km by definition).